JP4194036B2 - Auto idle stop vehicle - Google Patents

Description

  The present invention relates to an automatic idle stop vehicle having an automatic idle stop function for automatically stopping an engine under a predetermined condition when the vehicle is stopped, and is particularly suitable for a delivery two-wheeled vehicle used for delivery of newspapers and mails. The present invention relates to an automatic idle stop vehicle.

  From the viewpoint of environmental considerations and energy savings, in order to reduce exhaust gas and fuel consumption especially when idling, when the vehicle is stopped, the engine automatically stops, and the accelerator is operated from the stopped state to start the vehicle. Patent Document 1 describes an automatic idle stop vehicle that automatically restarts an engine to start the vehicle.

In a conventional automatic idle stop vehicle, the engine has been warmed up, the driver is on board, the vehicle speed is substantially zero, and the throttle is substantially closed for a predetermined time or longer. Then, the engine is automatically stopped, and then the engine is automatically restarted when the throttle grip is opened while the driver is in the vehicle.
JP 2002-235574 A

  In a delivery motorcycle used for delivery of newspapers, postal items, etc., when the vehicle stops, the driver immediately gets off, and after the delivery is finished, the driver gets on and immediately starts. In such a delivery vehicle, the driver gets off at the same time as the vehicle stops, so the idle stop condition is not satisfied. Therefore, there is a technical problem that idling is continued during delivery.

  An object of the present invention is to solve the above-described problems of the prior art and provide an automatic idle stop vehicle capable of automatically stopping idling at an appropriate timing even when used as a delivery vehicle.

  In order to achieve the above-described object, the present invention provides a means for detecting a traveling speed in an automatic idle stop vehicle that automatically stops an engine under a predetermined condition when the vehicle stops.

Means for holding the vehicle in a self-supporting state; means for detecting whether or not the self-supporting holding means is in a vehicle holding state; means for determining whether or not the driver is on board; and detecting a throttle opening. And (1) the traveling speed is zero, (2) the throttle opening is low, (3) the self-supporting holding means is in a vehicle holding state, and (4) the driver is not riding And a means for stopping the engine at a certain time.

And (5) a driver is on board, (6) the self-supporting holding means is not in a vehicle holding state, and (7) means for restarting the engine when the throttle opening is not a low opening. It is characterized by that.

According to the present invention, when the driver stops for delivery and gets off and sets a self-supporting vehicle holder such as a side stand or a main stand, the engine is immediately stopped, so idling can be prevented. Further, the driver rides stores side stand or main stand after delivery, since the engine is restarted when the opening operation of the throttle, can be made unnecessary a special operation for restarting the engine.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an overall side view of a motorcycle according to the present invention, which is equipped with an automatic idle stop system that stops an engine in response to a predetermined stop condition and then restarts in response to a predetermined start operation. is doing.

  The vehicle body front portion 2 and the vehicle body rear portion 3 are connected via a low floor portion 4, and a vehicle body frame including a down tube 6 and a main pipe 7 constitutes a skeleton of the vehicle body. The fuel tank and the storage box (both not shown) are supported by the main pipe 7, and the seat 8 is disposed above the fuel tank and the storage box. The seat 8 can also serve as a lid of a luggage box provided at the lower portion thereof, and the seat 8 is configured to be opened and closed by a hinge mechanism provided at the front portion thereof.

  In the vehicle body front portion 2, a steering head 5 is provided on the down tube 6, and a front fork 9 is pivotally supported by the steering head 5. A handle 11 is attached to the upper end of the front fork 9 extending upward, and a front wheel Wf is pivotally supported on the lower end. The upper part of the handle 11 is covered with a handle cover 10 that also serves as an instrument panel.

  A link member (hanger) 14 is pivotally supported in the middle of the main pipe 7, and the swing unit 17 is swingably connected to the main pipe 7 by the hanger 14. A single-cylinder four-cycle engine E is mounted on the front portion of the swing unit 17. A belt-type continuously variable transmission 12 is constructed from the engine E to the rear, and a rear wheel Wr is pivotally supported by a speed reduction mechanism 13 provided via a centrifugal clutch at the rear thereof. A rear suspension 22 is interposed between the upper end of the speed reduction mechanism 13 and the upper bent portion of the main pipe 7.

  An intake pipe 23 extending from the cylinder head 19 of the engine E is connected to the front portion of the swing unit 17. Further, the intake pipe 23 is provided with a vaporizer 24 and an air cleaner 25 connected to the vaporizer 24. Has been. A side stand (or main stand) 16 is pivotally attached to a pivot 18 provided at the lower part of the swing unit case 15, and the vehicle is held by standing the side stand 16 (illustrated with a chain line) when parking.

  FIG. 2 is a block diagram showing the configuration of the automatic idle stop system, and the same reference numerals as those described above represent the same or equivalent parts.

  A battery 32 is connected to the ECU 30 via a starter relay 31. A drive current is supplied from the battery 32 to the injector 35, the fuel pump 36 and the ignition coil 37 via the main fuse 33 and the main switch 34.

  The ECU 30 further includes a starter switch 41 for starting the engine, an idle switch 42 for manually allowing or restricting idling of the engine, and a seat switch 43 for detecting whether or not the driver is seated on the seat 8. A vehicle speed sensor 44 that detects the traveling speed, a throttle sensor 45 that detects the throttle opening θth, a throttle switch 46 that detects whether the throttle opening θth exceeds the reference opening θref, and a coolant temperature detection The TW sensor 47 for detecting the engine speed Ne, the Ne sensor 48 for detecting the engine speed Ne, the stop switch 49 for detecting the brake operation, and the stand switch 50 for detecting the state of the side stand 16 are connected.

  The automatic idle stop system of the present invention includes an operation mode in which idling is permitted (hereinafter referred to as “start & idle switch (SW) mode”) and an operation mode in which idling is limited (or prohibited) (hereinafter referred to as “automatic stop”). "Start mode").

  In the “start & idle switch (SW) mode” in which idling is permitted, idling is temporarily permitted after the first engine start after the main switch 34 is turned on for the purpose of warm-up operation when the engine is started. Further, idling is permitted even after the first engine start described above, according to the driver's intention (the idle switch 42 is “ON”). On the other hand, in the “automatic stop start mode” in which idling is limited, the engine is automatically stopped in response to a predetermined stop condition, and then, as a predetermined start operation, in this embodiment, the throttle grip is opened. The vehicle is automatically restarted and the vehicle can be started.

  FIG. 3 is a diagram schematically showing switching conditions of each operation mode. When the main switch 34 is turned on (condition 1 is satisfied), the “start & idle SW mode” is started. Further, in this “start-up & idle SW mode”, a vehicle speed higher than a planned speed (for example, 10 km / h) is detected, and the water temperature is equal to or higher than a predetermined temperature (for example, a temperature at which the warm-up operation is predicted to be completed). If the idle switch 42 is OFF (condition 2 is satisfied), the “automatic stop start mode” is activated.

  Further, in the “automatic stop start mode”, when the idle switch 42 is changed from “off” to “on” (condition 3 is satisfied), the operation mode is changed from “automatic stop start mode” to “start & idle SW mode”. Return. Note that in either the “automatic stop start mode” or the “start & idle SW mode”, the main switch is turned off (condition 4 is satisfied), and is turned off.

  Next, the operation of this embodiment will be described in detail with reference to the functional block diagram of FIG. 4 and the timing chart of FIG.

  As shown in FIG. 4, in this embodiment, the logical product of the inverted signal of the throttle switch signal S1, the inverted signal of the seat switch signal S2, the stand switch signal S3 and the inverted signal of the vehicle speed comparison signal S4 is obtained as the idle stop signal S5. When the idle stop signal S5 transits from the “L” level to the “H” level, the engine is automatically stopped.

  In the present embodiment, the throttle switch signal S1 indicates the “H” level when the throttle opening θth exceeds the reference opening θref, the seat switch signal S2 indicates the “H” level in the seated state, and the stand switch signal S3 is the stand switch signal S3. The “L” level is indicated in the stored state, and the vehicle speed comparison signal S4 is set in advance so as to indicate the “H” level when the current vehicle speed V exceeds the reference vehicle speed Vref. The reference opening θref of the throttle is set to a fully closed opening or a low opening near the opening, and the reference vehicle speed Vref is set to a stop speed (zero or very low speed) of the vehicle. Therefore, in this embodiment, the throttle is substantially closed, the running speed V is substantially zero (V ≦ Vref), the side stand 16 is in use, and the engine is not seated. It is automatically stopped.

  In this embodiment, the logical product of the inverted signal of the throttle switch signal S1, the seat switch signal S2, and the stand switch signal S3 is obtained as an engine restart signal S6. If the restart signal S6 is at "H" level, the engine It will be restarted. Therefore, in this embodiment, the driver is on board, the side stand 16 is in the retracted state, and the engine is restarted when the throttle grip is opened.

  In such a configuration, when the throttle opening θth falls below the reference opening θth at time t1 in FIG. 5, the throttle switch signal S1 transitions to the “L” level, and when the vehicle speed V falls below the reference vehicle speed Vref at time t2, the vehicle speed. The comparison signal S4 changes to “L” level. Thereafter, at time t3, the driver gets off and the seat switch signal S2 transits to the “L” level. Around this time, the side stand 16 of each farm pair is taken out and the stand switch signal S3 transits to the “H” level. Then, since the idle stop signal S5 transits from the “L” level to the “H” level, the engine is automatically stopped.

  Thereafter, the driver completes the delivery and returns to the vehicle. When the driver sits on the seat at time t4 and retracts the side stand before and after this, the seat switch signal S2 transits from the “L” level to the “H” level, The stand switch signal S3 transits from the “H” level to the “L” level. However, since the throttle remains closed here, the stop release signal S6 is still at the “L” level, and the current idle stop is maintained. Thereafter, when the throttle grip is opened at time t5, the throttle switch signal S1 transits from the “L” level to the “H” level. In response to this, the stop release signal S6 also changes from the “L” level to the “H” level. “Transition to level and engine restarts.

  FIG. 6 is a flowchart showing the operation of the present embodiment. In step S1, it is determined whether or not idling is stopped. If the vehicle is traveling, the process proceeds to step S2, and the current vehicle speed V is compared with the reference vehicle speed Vref. If the current vehicle speed V> the reference vehicle speed Vref, the process proceeds to step S7 and the current state is maintained. If the current vehicle speed V ≦ the reference vehicle speed Vref, the process proceeds to step S3. In step S3, the throttle opening .theta.th is compared with the reference opening .theta.ref. If .theta.th.ltoreq..theta.ref, it is determined that the vehicle is traveling and the routine proceeds to step S7, where the current state is maintained. On the other hand, if θth ≦ θref, the process proceeds to step S4. In step S4, based on the seat switch signal S2 (or step switch output signal: the same applies hereinafter), it is determined whether or not the driver is on board. If the vehicle is on board, the process proceeds to step S6, and the state of the side stand 16 is determined based on the stand switch switch signal S3. If the side stand 16 is not stored, the process proceeds to step S8 and the engine is stopped. If the side stand 16 is stored, the process proceeds to step S7 and the current state is maintained.

  On the other hand, if it is determined in step S4 that the driver is not in the vehicle, the process proceeds to step S5, and the state of the side stand 16 is determined based on the stand switch signal S3. If the side stand 16 is stored, it will progress to step S7 and the present condition will be maintained. If not, the process proceeds to step S8 and the engine is stopped.

  On the other hand, if it is determined in step S1 that the engine is idling stopped, the process proceeds to step S10. In step S10, it is determined whether or not the driver is in the same manner as described above. If the driver gets off, the process proceeds to step S7 and the current state is maintained, and if the driver gets on, the process proceeds to step S11. In step S11, the state of the side stand 16 is determined in the same manner as described above. If the side stand 16 is not stored, the process proceeds to step S7 and the current state is maintained. If the side stand 16 is stored, the process proceeds to step S12.

  In step S12, the throttle opening degree θth is compared with the reference opening degree θref. In the present embodiment, the reference opening θref is set to an opening that can detect a throttle opening operation at the time of start. Therefore, if θth ≦ θref, it is determined that the start operation has not been performed yet, the process proceeds to step S7, and the current state is maintained. On the other hand, if θth> θref, it is determined that a start operation has been performed, the process proceeds to step S13, and the engine is restarted.

  As described above, according to the present embodiment, when the traveling speed is substantially zero, the side stand is in use, and the driver is not riding, the engine is automatically stopped. When you get off and get off and set the side stand, the engine is stopped immediately and idling is prevented.

  Further, since the engine is restarted when the driver stores and rides on the side stand after the delivery and opens the throttle, a special operation for restarting the engine can be dispensed with.

In the above-described embodiment, it is described that one of the idling stop conditions is that the vehicle is held by the side stand 16 and that one of the engine restart conditions is that the side stand 16 is stored. but the present invention is not limited only to this, if the holder for holding the vehicle in a stopped state, instead of the side stand 16 may be a state of the main stand as idle stop / engine restart condition.

1 is an overall side view of an automatic idle stop vehicle according to the present invention. It is a block diagram of an automatic idle stop system. It is the figure which showed typically the switching condition of the operation mode in an automatic idle stop system. It is a functional block diagram of the principal part of an automatic idle stop system. It is a timing chart of an automatic idle stop system. It is the flowchart which showed operation | movement of the automatic idle stop system.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 16 ... Side stand, 30 ... ECU, 31 ... Starter relay, 32 ... Battery, 33 ... Main fuse, 34 ... Main switch, 35 ... Injector, 36 ... Fuel pump, 37 ... Ignition coil

Claims (3)

In an automatic idle stop vehicle that automatically stops the engine of a motorcycle under predetermined conditions when the vehicle is stopped,
Means for detecting the traveling speed;
A self-supporting holding means for holding the two-wheeled vehicle in a self-supporting state;
Means for detecting whether the self-supporting holding means is in a vehicle holding state;
Means for determining whether the driver is on board;
Means for detecting the throttle opening;
Means for stopping the engine to an idle stop state when the traveling speed is zero, the throttle opening is low, the self-supporting holding means is in a vehicle holding state, and the driver is not riding Including
When the driver is in the idle stop state and the self-supporting holding means is not in the vehicle holding state, the engine is restarted by making the throttle opening larger than the reference opening. An automatic idle stop vehicle characterized by 2. The automatic idle stop vehicle according to claim 1, wherein the self-supporting holding means is a side stand. The automatic idle stop vehicle according to claim 1 or 2, wherein the self-supporting holding means is a main stand.

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